drivers/iio/industrialio-backend.c

60 	struct iio_backend *back;
70 #define iio_backend_check_op(back, op) ({ \
71 	struct iio_backend *____back = back;				\
80 #define iio_backend_op_call(back, op, args...) ({		\
81 	struct iio_backend *__back = back;			\
91 #define iio_backend_ptr_op_call(back, op, args...) ({		\
92 	struct iio_backend *__back = back;			\
105 #define iio_backend_void_op_call(back, op, args...) {		\
106 	struct iio_backend *__back = back;			\
116  * @back:	Backend device
122 int iio_backend_chan_enable(struct iio_backend *back, unsigned int chan)
124 	return iio_backend_op_call(back, chan_enable, chan);
130  * @back:	Backend device
136 int iio_backend_chan_disable(struct iio_backend *back, unsigned int chan)
138 	return iio_backend_op_call(back, chan_disable, chan);
142 static void __iio_backend_disable(void *back)
144 	iio_backend_void_op_call(back, disable);
150  * @back:	Backend device
155 int devm_iio_backend_enable(struct device *dev, struct iio_backend *back)
159 	ret = iio_backend_op_call(back, enable);
163 	return devm_add_action_or_reset(dev, __iio_backend_disable, back);
169  * @back:	Backend device
179 int iio_backend_data_format_set(struct iio_backend *back, unsigned int chan,
185 	return iio_backend_op_call(back, data_format_set, chan, data);
193 	iio_backend_void_op_call(pair->back, free_buffer, pair->buffer);
199  * @back:	Backend device
212 				    struct iio_backend *back,
222 	buffer = iio_backend_ptr_op_call(back, request_buffer, indio_dev);
227 	pair->back = back;
236 	struct iio_backend *back = arg;
238 	module_put(back->owner);
241 static int __devm_iio_backend_get(struct device *dev, struct iio_backend *back)
252 	if (!try_module_get(back->owner))
256 	ret = devm_add_action_or_reset(dev, iio_backend_release, back);
260 	link = device_link_add(dev, back->dev, DL_FLAG_AUTOREMOVE_CONSUMER);
264 				     dev_name(back->dev));
266 	dev_dbg(dev, "Found backend(%s) device\n", dev_name(back->dev));
284 	struct iio_backend *back;
306 	list_for_each_entry(back, &iio_back_list, entry) {
307 		if (!device_match_fwnode(back->dev, fwnode))
311 		ret = __devm_iio_backend_get(dev, back);
315 		return back;
339 	struct iio_backend *back;
343 	list_for_each_entry(back, &iio_back_list, entry) {
344 		if (!device_match_fwnode(back->dev, fwnode))
347 		ret = __devm_iio_backend_get(dev, back);
351 		return back;
360  * @back:	Backend device
362 void *iio_backend_get_priv(const struct iio_backend *back)
364 	return back->priv;
370 	struct iio_backend *back = arg;
373 	list_del(&back->entry);
390 	struct iio_backend *back;
401 	back = devm_kzalloc(dev, sizeof(*back), GFP_KERNEL);
402 	if (!back)
405 	back->ops = ops;
406 	back->owner = dev->driver->owner;
407 	back->dev = dev;
408 	back->priv = priv;
410 		list_add(&back->entry, &iio_back_list);
412 	return devm_add_action_or_reset(dev, iio_backend_unregister, back);